| irreverent | (adjective) showing lack of due respect or veneration | - |
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| (adjective) not revering god | Synonyms: godless |
| (adjective) characterized by a lightly pert and exuberant quality | Synonyms: impertinent, pert, saucy |
| irreversible | (adjective) incapable of being reversed | - |
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| nonreversible | (adjective) not reversible or capable of having either side out | Synonyms: one-sided |
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| pareve | (adjective) containing no meat or milk (or their derivatives) and thus eatable with both meat and dairy dishes according to the dietary laws of Judaism | Synonyms: parve |
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| prevenient | (adjective) in anticipation | Synonyms: anticipatory |
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| preventable | (adjective) capable of being prevented | - |
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| preventative | (adjective) tending to prevent or hinder | Synonyms: preventive |
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| (adjective) preventing or contributing to the prevention of disease | Synonyms: preventive, prophylactic |
| preventive | (adjective) tending to prevent or hinder | Synonyms: preventative |
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| (adjective) preventing or contributing to the prevention of disease | Synonyms: preventative, prophylactic |
| revealing | (adjective) showing or making known | - |
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| (adjective) disclosing unintentionally something concealed | Synonyms: telling, telltale |
| revelatory | (adjective) prophetic of devastation or ultimate doom | Synonyms: apocalyptic, apocalyptical |
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| (adjective) (usually followed by `of') pointing out or revealing clearly | Synonyms: indicative, indicatory, significative, suggestive |
| revenant | (adjective) of or relating to or typical of a revenant | - |
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| (adjective) coming back | Synonyms: recurring |
| revengeful | (adjective) disposed to seek revenge or intended for revenge | Synonyms: vengeful, vindictive |
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| reverberant | (adjective) having a tendency to reverberate or be repeatedly reflected | - |
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| reverberating | (adjective) characterized by resonance | Synonyms: resonant, resonating, resounding, reverberative |
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| reverberative | (adjective) characterized by resonance | Synonyms: resonant, resonating, resounding, reverberating |
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| revered | (adjective) profoundly honored | Synonyms: august, venerable |
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| reverend | (adjective) worthy of adoration or reverence | Synonyms: sublime |
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| reverent | (adjective) feeling or showing profound respect or veneration | - |
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| (adjective) showing great reverence for god | Synonyms: godly, worshipful |
| reverential | (adjective) feeling or manifesting veneration | Synonyms: respectful, venerating |
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| reverse | (adjective) of the transmission gear causing backward movement in a motor vehicle | - |
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| (adjective) directed or moving toward the rear | Synonyms: rearward |
| (adjective) reversed (turned backward) in order or nature or effect | Synonyms: inverse |
| reversed | (adjective) turned about in order or relation | Synonyms: converse, transposed |
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| (adjective) turned inside out and resewn | - |
| reversible | (adjective) capable of reversing or being reversed | - |
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| (adjective) capable of being reversed or used with either side out | Synonyms: two-sided |
| (adjective) capable of assuming or producing either of two states | - |
| (adjective) capable of being reversed | - |
| reversionary | (adjective) of or relating to or involving a reversion (especially a legal reversion) | - |
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| reversive | (adjective) tending to be turned back | Synonyms: returning |
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| revertible | (adjective) to be returned to the former owner or that owner's heirs | - |
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| reverting | (adjective) tending to return to an earlier state | Synonyms: returning |
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| unpreventable | (adjective) not preventable | - |
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| unrevealed | (adjective) not made known | Synonyms: undisclosed |
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| unreverberant | (adjective) not reverberant; lacking a tendency to reverberate | Synonyms: nonresonant |
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